Cable armor cutter



y 1945- R. R. KRAMER 2,374,753

CABLE ARMOR CUTTER Filed Oct. 2, 1943 2 Sheets-Sheet l a 5 4 H4 5 6 I -6 /4 r o o 12 /0 11:9 7

| /3 /5 Y 0 5 7 I 4 a oo' lo} 0 o I nz'entor y 1945- R. R. KRAMER CABLE ARMOR CUTTER Filed Oct, 2, 1943 2 Sheets-Sheet 2 Inventor Patented May 1, 1945 UNITED STATES PATENT OFFICE CABLE ARMOR CUTTER Raymond B. Kramer, Evansville, Ind. Application October 2, 1943, Serial No. 504,768

3 Claims. (CI. 29-69) The present invention relates to new and useful improvements in tools for removing the woven armor on marine electrical cables, and has for its primary object to provide, in a manner as hereinafter set forth, a device of this character comprising a novel construction and arrangement for expeditiously slitting the armor longitudinally of the cable.

Another very important object of the invention is to provide a cable cutting or ripping tool of the aforementioned character which is adapted to guide and propel itself along the cable.

Still another very important object of the invention is to provide a cable armor cutter or ripper of the character described which is adapted to operate on different sizes of cables.

Other objects 'of the invention are to provide a cable armor cutter or ripper which will be comparatively simple in construction, strong, durable, highly efiicient and reliable in use, compact, and which may be manufactured at low cost.

All of the foregoing, and still further objects and advantages of the invention will become apparent from a study of the following specification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 1 is a top plan View of a cable armor cutter constructed in accordance with the present invention.

Figure 2 is a View in side elevation of the device.

Figure 3 is a view in vertical longitudinal section through the tool, showing said tool operating on a cable.

Figure 4 is an end elevational View.

Figure 5 is a cross-sectional view through the device.

Figure 6 is a detail view in perspective of the pressure roller support.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a substantially rectangular frame I of suitable material. Journaled transversely in the frame I is a pair of shafts 2 and 3. The shaft 2 is comparatively long and said shaft may be connected to any suitable source of power. Reduction ears 4 conmeet the shaft 2 to the shaft 3. The gears 4 include hubs 5 which are secured by set screws 6 on the shafts 2 and 3.

A traction roller I is secured by a set screw 8 on the shaft 3 for operation in the forward end portion of the frame I. Mounted on the shaft 2 for operation in the frame I is a saw guide roller 9. As illustrated to advantage in Figure 5 of the drawings, the roller 9 includes a pair of sections I0 which are threadedly mounted on the shaft 2 and which secure therebetween on said shaft a circular saw or cutter I I.

Projecting longitudinally from the rear end of the frame I is a pair of bearings I2. A shaft I3 is journaled in the bearings IZ. Extending downwardly and forwardly from one end of the shaft I3 is an arcuate arm I4 which terminates in an inturned free end portion constituting a spindle I5. The spindle I5 extends transversely beneath the frame I and has journaled thereon a roller I6. I3 for swinging the roller I6 upwardly beneath the cable.

It is thought that the operation of the device will be readily apparent from a consideration of the foregoing. Briefly, the am M with the roller I6 thereon are swung downwardly against the tension of the spring II to permit the frame I to be mounted longitudinally on the cable, a at I8.

The arm I4 is then released and the roller I6 is pressed upwardly against the cable I8 by the spring I I. Thus, the traction roller I and the roller 9 are held tightly in contact with the cable. The rollers I, 9 and IE, it will be observed, conform substantially to the contour of the cable. Power is then applied to the shaft 2 for rotating the saw I I and for driving the shaft 3 with the traction roller I thereon through the reduction gears 4. In this manner the tool propels itself along the cable and the saw I I slits the armor longitudinally of said cable. The roller I6 engages the cable I3 just rearwardly of the traction roller I for maximum effectiveness.

It is believed that the many advantages of a l. A cable armor cutter comprising a frame, a concaved traction roller in the frame engageable with one side of a cable-for moving said frame longitudinally of the cable, means for actuating the traction roller, a concaved spring-pressed roller on the frame engageable with the opposite side of the cable for pressin the traction roller thereagainst, a circular saw rotatably mounted in the frame and engageable with the first-named A coil spring I1 is connected to the shaft side of the cable, and mean for actuating said saw, said saw being arranged intermediate the ends of the rollers and so as to slit the armor longitudinally when the cutter is moved longitudi-' nally of the cable.

' 2. A cable armor cutter comprising a frame movable on an armored cable, shafts journaled in the frame, gears connecting said shafts, a concaved traction roller on one of the shafts operations, and means on the frame engageable with l the opposite side of the cable for pressing the rollers and the saw thereagainst, said last-named meansincluding a concaved roller mounted forl movement toward and away from the firstand second-named rollers and means to move said third roller toward said firstand second-named rollers.

3. A cable armor cuttercomprising a frame movable on an armored cable, shafts journaled in the frame, gears connecting said shafts, a traction roller on one of the shafts operable in the frame and engageable with the cable for moving said frame thereon, a roller fixed on the other shaft, the second-named roller including a pair of sections, a circular saw mounted between said sections, and means on the frame engageable with the cable for pressing the rollers and the saw thereagainst, said means including a shaft journaled in the frame, an arm on the last-named shaft, a spindle on said arm, a roller journaled on the spindle and engageable with 1 the cable, and a spring connected to the thirdnamed shaft for yieldingly pressing the lastnamed roller against the cable.

RAYMOND R. KRAMER. 

